About 54 minutes in, the Ymir walks past a large globular boulder which has a raised circular area right in the middle. There is a small raised "nubbin" in the middle of the smaller circle. Once you actually look at it, you will think, "Hey, there's a boobie!"

I've read dozens of reviews of this movie and talked about it with several people and I've never heard anyone mention what I call "the Boob-ish rock." I suppose some guy involved in setting up the scenery decided to play a little joke. And he's been waiting 50 years for someone to notice what he did.

A couple of minutes later some soldiers gather at the rock so you get a really good look at it. Oh yeah, that's a boob.